It makes tons of sense. But most people don’t have that kind of sense. My point was that if you’re asking if it makes sense, the answer is probably that you don’t want to learn to have that kind of sense. 
Unless you don’t understand how it works and then just leave everything wide open in desperation trying to get it to work at all, thinking that you’ll fix the permissions on that wide-open whatever it was after you get it going. . .